FAVG is a Perl script (available here) that a column of numbers from a text file and returns the average and correlation for that column. It can be useful in conjunction with VARF when analyzing XMD output files (the *.xmo files).
Here is the command line info from the script.
favg [-s "start" "stop"] file Read columns of number from data file and returns the average of each column for lines beginning with a number. Also returns the estimated error, the estimated correlated error, and the estimated correlation length. Optional "start" and "stop" strings determine first and last file lines. The first line containing the string "start" signals the following line as the first data line. The first string containing the string "stop" signals the previous lines as the end of data. The special character - (the minus sign) can be used in place of "start" or "stop". It means start at the file beginning, or stop at the file end. Sample output... Column Count Average Error Corr. Error Corr. Length ------ -------- -------------- ------------ ------------ ------------ 1 200 3.010000e+02 1.6269e+01 1.9900e+02 1.4862e+02 2 200 -4.560900e+04 2.6450e-01 3.6252e+00 1.8686e+02 3 200 -4.748500e+04 1.4616e+01 1.9503e+02 1.7704e+02 4 200 1.876700e+03 1.4366e+01 1.9141e+02 1.7653e+02